Goedel's ontological proof has been analysed for the first-time with an unprecedent degree of detail and formality with the help of higher-order theorem provers. {{An important example for the advantage of formalizing and the safety gained by checking theorems by means of theorem provers}}Christoph Benzmüller, Bruno Woltzenlogel Paleo: "Formalization, Mechanization and Automation of Gödel's Proof of God's Existence", Arxiv (2013)http://arxiv.org/abs/1308.4526